Add support for translations in actual addons

.gitignore

@@ -36,6 +36,9 @@ build/Release
 node_modules/
 jspm_packages/
 
+# Include node modules used in tests
+!fixtures/**/node_modules
+
 # TypeScript v1 declaration files
 typings/
 

README.md

@@ -43,6 +43,26 @@ To prevent that from happening you can configure a `whitelist`, which accepts an
 array of regular expressions that will be checked when looking for unused
 translations.
 
+### `externalPaths`
+
+If your application uses translations provided by (external) addons, then those
+translations will show up as missing by default. In order to include such translations,
+you can define `externalPaths` in the configuration file as follows:
+
+```js
+export default {
+  externalPaths: ['my-addon'],
+};
+```
+
+This example will try to find translation files in `node_modules/my-addon/translations`.
+Patterns supported by [`globby`](https://www.npmjs.com/package/globby) are also
+possible here, e.g. this:
+```js
+externalPaths: ['@*/*']
+```
+will look up translations in scoped addons like `node_modules/@company/scoped-addon/translations`.
+
 ### `--fix`
 If your application has a lot of unused translations you can run the command with
 the `--fix` to remove them. Remember to double check your translations as dynamic

__snapshots__/test.js.snap

@@ -44,6 +44,22 @@ exports[`Test Fixtures emblem 1`] = `
 
 exports[`Test Fixtures emblem 2`] = `Map {}`;
 
+exports[`Test Fixtures external-addon-translations 1`] = `
+"[1/4] 🔍  Finding JS and HBS files...
+[2/4] 🔍  Searching for translations keys in JS and HBS files...
+[3/4] ⚙️   Checking for unused translations...
+[4/4] ⚙️   Checking for missing translations...
+
+ 👏  No unused translations were found!
+
+ ⚠️   Found 1 missing translations!
+
+   - other-external-addon.used-by-app-translation (used in app/templates/application.hbs)
+"
+`;
+
+exports[`Test Fixtures external-addon-translations 2`] = `Map {}`;
+
 exports[`Test Fixtures in-repo-translations 1`] = `
 "[1/4] 🔍  Finding JS and HBS files...
 [2/4] 🔍  Searching for translations keys in JS and HBS files...

fixtures/external-addon-translations/app/controllers/application.js

@@ -0,0 +1,7 @@
+import Controller from '@ember/controller';
+
+export default class ApplicationController extends Controller {
+  get foo() {
+    return this.intl.t('js-translation');
+  }
+}

fixtures/external-addon-translations/app/templates/application.hbs

@@ -0,0 +1,4 @@
+{{t "hbs-translation"}}
+{{t "external-addon.used-by-app-translation"}}
+{{t "other-external-addon.used-by-app-translation"}}
+{{t "company.scoped-addon.used-by-app-translation"}}

fixtures/external-addon-translations/translations/en.yaml

@@ -0,0 +1,2 @@
+hbs-translation: HBS!
+js-translation: JS!

index.js

@@ -25,7 +25,7 @@ async function run(rootDir, options = {}) {
   const NUM_STEPS = 4;
   const step = num => chalk.dim(`[${num}/${NUM_STEPS}]`);
 
-  let config = readConfig(rootDir);
+  let config = options.config || readConfig(rootDir);
 
   log(`${step(1)} 🔍  Finding JS and HBS files...`);
   let appFiles = await findAppFiles(rootDir);
@@ -37,12 +37,21 @@ async function run(rootDir, options = {}) {
 
   log(`${step(3)} ⚙️   Checking for unused translations...`);
 
-  let translationFiles = await findTranslationFiles(rootDir);
-  let existingTranslationKeys = await analyzeTranslationFiles(rootDir, translationFiles);
+  let ownTranslationFiles = await findOwnTranslationFiles(rootDir);
+  let externalTranslationFiles = await findExternalTranslationFiles(rootDir, config);
+  let existingOwnTranslationKeys = await analyzeTranslationFiles(rootDir, ownTranslationFiles);
+  let existingExternalTranslationKeys = await analyzeTranslationFiles(
+    rootDir,
+    externalTranslationFiles
+  );
+  let existingTranslationKeys = mergeMaps(
+    existingOwnTranslationKeys,
+    existingExternalTranslationKeys
+  );
   let whitelist = config.whitelist || [];
 
   let unusedTranslations = findDifferenceInTranslations(
-    existingTranslationKeys,
+    existingOwnTranslationKeys,
     usedTranslationKeys,
     whitelist
   );
@@ -82,7 +91,7 @@ async function run(rootDir, options = {}) {
   let totalErrors = missingTranslations.size + unusedTranslations.size;
 
   if (shouldFix) {
-    removeUnusedTranslations(writeToFile, rootDir, translationFiles, unusedTranslations);
+    removeUnusedTranslations(writeToFile, rootDir, ownTranslationFiles, unusedTranslations);
     log();
     log(' 👏 All unused translations were removed');
   }
@@ -113,8 +122,19 @@ async function findInRepoFiles(cwd) {
   return globby(joinPaths(inRepoFolders, ['**/*.js', '**/*.hbs', '**/*.emblem']), { cwd });
 }
 
-async function findTranslationFiles(cwd) {
-  let inputFolders = ['', ...findInRepoPaths(cwd)];
+async function findOwnTranslationFiles(cwd) {
+  return findTranslationFiles(cwd, ['', ...findInRepoPaths(cwd)]);
+}
+
+async function findExternalTranslationFiles(cwd, config) {
+  if (!config.externalPaths) {
+    return [];
+  }
+
+  return findTranslationFiles(cwd, joinPaths('node_modules', config.externalPaths));
+}
+
+async function findTranslationFiles(cwd, inputFolders) {
   let translationPaths = joinPaths(inputFolders, ['translations']);
 
   return globby(joinPaths(translationPaths, ['**/*.json', '**/*.yaml', '**/*.yml']), {
@@ -388,4 +408,19 @@ function getNestedAttribute(parent, keys) {
   return attribute;
 }
 
+function mergeMaps(mapA, mapB) {
+  let resultMap = new Map([...mapA]);
+
+  for (let [key, bFiles] of mapB) {
+    if (!resultMap.has(key)) {
+      resultMap.set(key, bFiles);
+    } else {
+      let aFiles = resultMap.get(key);
+      resultMap.set(key, new Set([...aFiles, ...bFiles]));
+    }
+  }
+
+  return resultMap;
+}
+
 module.exports = { run, generateFileList };

test.js

@@ -11,8 +11,14 @@ describe('Test Fixtures', () => {
     'missing-translations',
     'unused-translations',
     'in-repo-translations',
+    'external-addon-translations',
   ];
   let fixturesWithFix = ['remove-unused-translations', 'remove-unused-translations-nested'];
+  let fixturesWithConfig = {
+    'external-addon-translations': {
+      externalPaths: ['@*/*', 'external-addon'],
+    },
+  };
 
   beforeEach(() => {
     output = '';
@@ -34,6 +40,7 @@ describe('Test Fixtures', () => {
         fix: fixturesWithFix.includes(fixture),
         color: false,
         writeToFile,
+        config: fixturesWithConfig[fixture],
       });
 
       let expectedReturnValue = fixturesWithErrors.includes(fixture) ? 1 : 0;